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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 358 (Air Conditioning System - Diagnostics) >> Circuit Inspection >> Heater Main Relay Circuit >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

The heater main relay is switched on by signals from the A/C amplifier. It supplies power to the blower motor.

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